{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144176898",
    "entityType": "Track",
    "nonce": "0x9b06a6a3731d07393511574a1c52b2e3cbbace978d148c9b4668e4680f6690ea",
    "signature": "0x9268735bfb7039dc961292af71a3c9a65e6c1c5474fc5ef1f7f54bab24ca8a3414c61f3c0f2e38189e571fef4eac4b71a7cda774e620a08fc5a86d73c418532e1c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}