{
  "manageEntity": {
    "action": "Save",
    "entityId": "515618823",
    "entityType": "Track",
    "nonce": "0xe0775bb951c915896f78c1ceebb00abcbd41ccc88713dc1207a00a810ab81ab9",
    "signature": "0x77db2b4a9de6b6bbd6e9187547c77f94a76104d57c21c39a40fe002e2dbe8b1e1a2f24c7d54bcbef6a43676ba934a012271b0ae243edc79c7af323e04aac1bc81c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}