{
  "manageEntity": {
    "action": "Save",
    "entityId": "167835",
    "entityType": "Track",
    "nonce": "0x506bdfb56a2094611beee2144e904412337e559a87c09a8cf2fddfb5aa75d178",
    "signature": "0xd0c9b37d1c681e7d0773c504703f2de5e969742d3ede4ad6930fe6c3e0fd8f4a731be553f78de432a4cf49a70ed4b5d13bbd5c2cf11a9960e378609f1bd228741c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}