{
  "manageEntity": {
    "action": "Save",
    "entityId": "1410791290",
    "entityType": "Track",
    "nonce": "0xabdeed382de80248bfe4c0361bbd11ec1f98f7bb8dfa22cb69e78a2bb4346e50",
    "signature": "0x6ce8eeb4e8de0999fc1fe7206525f13a2f00f5a26012547e53bc0014c97185fa6ad0a98d1b3076dd60885f3cc75622c1448b7be7a9bea1cc538be7000527cb271b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}