{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953207860",
    "entityType": "Track",
    "nonce": "0x59bc23637df63ca1b77b5241cb814311340f9e0b3f0503f53daa43b680d19428",
    "signature": "0x4964d846f058153d6ffa78bdafbb57e93b63fa11275300b86857ba894d66126d5faf5908ca71658a07ad364838e7ed5775658245692a3d49a26a384c4bfcc8491c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}