{
  "manageEntity": {
    "action": "Save",
    "entityId": "1897848824",
    "entityType": "Track",
    "nonce": "0xae389e53ad4fadc3aaeff54c32d7c5f61454a21b82e2634ec0952a2e78f0576f",
    "signature": "0xa732b99de186b43937d6607544011e2a8ecfec583fe44e8283f801f9319b663d6d0b72562e80acc1a616e1a9446faf200b2e8fe1c8dca2f534c292362b0b0ab31c",
    "signer": "0x50Ae5c6e77f43cA1009EcC10DC8dA0498d717929",
    "userId": "341195"
  }
}