{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886664918",
    "entityType": "Track",
    "nonce": "0x93a135fb3e24a4ed999b7a13862a3cd0355bc2cb5379c7811da6650fa0d807a0",
    "signature": "0xc77c13b77868690b0f0f75b441ad5aa320d582931888f1cf99f137bdcee30bac2789371816af6758c7a64b2263edcbf69238f0ad4bdbe4985445a6197d0b19731b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}