{
  "manageEntity": {
    "action": "Save",
    "entityId": "2111820825",
    "entityType": "Track",
    "nonce": "0xc5dce7e1e5cc58157e8800a88ebdfedae9ef2ba9f34f6222e45a578b71f2ba94",
    "signature": "0x3c46f75da24e0b1c7eb884f03a84f99d0db171b64047b958fd6e26c4a099c3c46c1084772954c1bcbd71aaf0fdaf57729273d1998bc72ca5ef15f01a8735b7ec1b",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}