{
  "manageEntity": {
    "action": "Save",
    "entityId": "702706524",
    "entityType": "Track",
    "nonce": "0x3e7cfdc9565b6b99ac603761e52ffbe06ea88c16521bc95b4e93e36ffc7c3501",
    "signature": "0xbdda8a9dc9ecfafc61f5c020923434341183d98e7dd4dd43fad5c8b0767b84de549da58b01daecd79349b1cf204b082a08739c07626ac085dd4e251cde5894681c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}