{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125699",
    "entityType": "Track",
    "nonce": "0x384c227ed3fe2b2887fbabdf3702ac422318d8b9fb3d5ca91b26703acca90cd8",
    "signature": "0x914252f69d0b3ecd6643c01e5b532e51bf45c55ac13c05a9a38f01456aa5c6376e2a35bd73d72e3118f2ca72b11bdf2074306555ee1344544991ab1f72c90fb41c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}