{
  "manageEntity": {
    "action": "Save",
    "entityId": "974968106",
    "entityType": "Track",
    "nonce": "0x2648260a8ab97cc3cb595ecb523a908db99989b8af36e3e72a65c3a60dbf3643",
    "signature": "0x364d7c81b7bc246b69c1fa9e8b72c33d07b271d90862f1fe879849f3d2e62b8008bf72868b595ff3f6f812264a5b9b4723c9aec28b49c7ae9e6c0e13699f9f361c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}