{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390696618",
    "entityType": "Track",
    "nonce": "0xc3e923f8d2ca2434667b979d712364a7a45b91c4702d6052767235c594d7d9ff",
    "signature": "0x75861f53089bce6b51931e42b660d520610779f3f32cace3a5aee2d89a0e35495f80709957a3add2139b0ecd007a61623d9e3f885768a93c65eb905ef21083a81c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}