{
  "manageEntity": {
    "action": "Save",
    "entityId": "2010554078",
    "entityType": "Track",
    "nonce": "0x1ac5752107127398453e28b3e542fd97d59df2b02ba3bdffd2befa776819ec1a",
    "signature": "0xaca8f500d04242567d180889f3ec7cd166cd9c16eff80e8b22be09668c87db4327b3b101b8da947dfcf4198facd038014ebdda88a9994942e830e15857076fdb1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}