{
  "manageEntity": {
    "action": "Save",
    "entityId": "251741236",
    "entityType": "Track",
    "nonce": "0x60cbcbdfc6ea9c3d9ae5131fd2171f92239ac8f2089275788624ebf37ccfd85b",
    "signature": "0x0af3c82442487f0a9fd075abf7a0a30a5cc0201a6c044032d51215f4159a69b929ba5aaaa97aad35e4c5394c6e0a2711a16991c146865a2838fe86cb219be95b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}