{
  "manageEntity": {
    "action": "Save",
    "entityId": "154303630",
    "entityType": "Track",
    "nonce": "0x0c21a5654d532841b64ef07ba625af366b677239aaa597d1b590f899e2610bc6",
    "signature": "0x380c7dd5b3a707fbec8003403a7aa0b4a29051f0d2a15eaadd8da6e4eb6903083e9f0322202df18edff4b181a7c8e3e98a7e4db204173c004c3f0863d117c2091c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}