{
  "manageEntity": {
    "action": "Save",
    "entityId": "406111",
    "entityType": "Track",
    "nonce": "0x8f1148b6fc5c2447ac0bd29d1355ac0371e843dcd2a9ecefb9fc122f2f2ffd34",
    "signature": "0xf20a1d0a085278ea1a469cb7f0e8e16385b7a2c8c172c8797bfec8049847242f5a3885a4c840ec73a5679af66f50ec7e2aed5739282ff116f70a97ed2d775a3f1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}