{
  "manageEntity": {
    "action": "Save",
    "entityId": "2142240938",
    "entityType": "Track",
    "nonce": "0x2e2c0b4c569d9778e88f755fbcef8c6a93081d3f52abe30b210be1f344a2304b",
    "signature": "0x3bae1f3d4c03759e32114da264c5472e6334c82c5618e6c48fb915671bcfb00a0e8ee75b391ed9d881bd844a232e3ec0d5c7b9894b65afe6d5652eebcfe7e5961b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}