{
  "manageEntity": {
    "action": "Save",
    "entityId": "13749166",
    "entityType": "Track",
    "nonce": "0x98dbd42b09b80bfbb40f815f451fcf64556ea77b8a143f8cc0d1090b29e5e1cf",
    "signature": "0x2bdc1dbb1d491e49036bef5baa9d27ec1107fd50b55c5e42ed4fbce07d4f3dfa13a82d49db2c6089997ed475764f61a0cbf8cc992a0cfab36b0f56f66b9c040e1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}