{
  "manageEntity": {
    "action": "Save",
    "entityId": "102270",
    "entityType": "Track",
    "nonce": "0x7eddcf763f8cd611133e609b9f0e0fb739ed5032f477e8a94a984c8a6396d51a",
    "signature": "0x8353d3efa93544bed947dc48aa074a9bf45b1f7297ed34ac500800461d35718c3cda9ca3541912df3e89a4c0f47aeb34a1b67b22a2222264c072d1e678c8af281c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}