{
  "manageEntity": {
    "action": "Save",
    "entityId": "243304",
    "entityType": "Track",
    "nonce": "0xc3cd9a979c32a5a7ef1926f0f57fae4c1b5789e023e120c3b11d4a0bb5b8eb65",
    "signature": "0x9711b0450c2e255f824db0134602e26c3c85efa5536a8d2259eafb95594714112bfeff368113bdd8003241a2791dff46ee18a5d02c81f7037c8d311d2371c6401b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}