{
  "manageEntity": {
    "action": "Save",
    "entityId": "212896575",
    "entityType": "Track",
    "nonce": "0xcc6af0c9a3ebe6da885256f229313b8c340b2dc28ec043755823d0f2d45b6d64",
    "signature": "0x61fe18bdbbb74566c86db95944e5334d6bd00f43a7e2b3e91bc0d422215e796476d1f90efe621d7624c9cc7ea2b292a3a2e433114dc22d6d92b916fb02679dc61b",
    "signer": "0x2A9f38A07e5481204Ee221Cb20a21d175F652920",
    "userId": "1096896"
  }
}