{
  "manageEntity": {
    "action": "Save",
    "entityId": "106587",
    "entityType": "Track",
    "nonce": "0xbb2f8e09891d52d278166e2bb407bcab9315fd85a90e71b817a2f01666186d97",
    "signature": "0x4861be37bdb32930d9b9c0b5d28b5a3c34bef5f4573db49ffcf5b9255c588e4c4b269941b33eb5b31a50bbd82c0caaf6cb5c50bf5eb2d5ef1384276ae72b75e11c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}