{
  "manageEntity": {
    "action": "Save",
    "entityId": "740899311",
    "entityType": "Track",
    "nonce": "0xfc31058199dd60565d33aa2e2b2620b9f2e6078810009aeea02505e9a00d4f20",
    "signature": "0x2c10acc23974befdf1295e677f36db4650d8a652c118f35b364ee0fa4cd2d896316919df9f3d167da6a677dfd09b14285859fadadec6ba8cb5102aabbf5a05691c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}