{
  "manageEntity": {
    "action": "Save",
    "entityId": "1846471980",
    "entityType": "Track",
    "nonce": "0xdca296e276fa61d3c016343c98b73060f5936a59862cf29f1a253c7466a7c0c8",
    "signature": "0x2eee9abeaea121f4aa544a215bc7e88fb8409c1c0d22a77ef6a6b7f8f863e5f81e1d085c3937ad349cc2d9db85824009b62f707d8447b18ee8b2cf7d599ae9ad1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}