{
  "manageEntity": {
    "action": "Save",
    "entityId": "676869249",
    "entityType": "Track",
    "nonce": "0x0ed7cdb9fad935385cfe7ba6338f4e59b5a0f0e9b39bd3863362f639a586dc8a",
    "signature": "0x7d9a8417c60fbd26c55a9d97a31578329669c34a0427e5f1005fa787298a75464ff532a704a30eb4e23fe31777237db930c60cbbd100e0f2cbcc6ffede4e1e8d1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}