{
  "manageEntity": {
    "action": "Save",
    "entityId": "1005638166",
    "entityType": "Track",
    "nonce": "0xf6646d2676af2f7447ab300ce32e52450ffeea5a3b0d4b39f1f2cd0e857f22a4",
    "signature": "0x9e310d3c8b558148dc1d1705f80d93b3e65d0b83af93583aed512f946770b3fb4d3271a84ed362b0374ecc63b49d8fe6a4a26f98207ee0f2c13dc4d59d9393c41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}