{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674422749",
    "entityType": "Track",
    "nonce": "0x0b6b74be854c55d9a316248102de381c73d516f7831c48b1e14cbd90b2729680",
    "signature": "0xaa98340d2f2e8d2be8fad930d79171f0390ab953e7a3b097ca8198c9dc2d26935d3b98a187b1357521418c6957703679b79145ce5e48b1d06efd41a5ae557f841b",
    "signer": "0xc5cf87ec41c4e5c2D477b300A58898188E26f6b0",
    "userId": "866131253"
  }
}