{
  "manageEntity": {
    "action": "Save",
    "entityId": "1929998750",
    "entityType": "Track",
    "nonce": "0x017cce5529cc760ebe0d37271bc2e5564c47e605c4cb3ac2fb8ff30e148e801c",
    "signature": "0xa878382547c96909640f0c2b9048989a74249fadd2e9b48924626e7601a909963785cbe5f395be4b05076ff30a691f1ddeea1cadf73ee5e6b77601ffca01fbe81c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}