{
  "manageEntity": {
    "action": "Save",
    "entityId": "161889552",
    "entityType": "Track",
    "nonce": "0xc5c17a69360617715f5d8366ac657977e9e02c91e297180fbfb90e175449aece",
    "signature": "0xe70d788b6de4a4e4bd97a53118ecf3e7a144e78e7e06a546a7ec83a2c34a54e65d65722e126b858630c9b19c2fd7abb138a5c0996d149bd8f66c74cab9f893f91c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}