{
  "manageEntity": {
    "action": "Save",
    "entityId": "1091440271",
    "entityType": "Track",
    "nonce": "0x42ca6f7df6c8979467a5e1c45631927449cc712c9a3baed91d42bcfc45384e2a",
    "signature": "0xdce84b927aad75628b379ee7926a90eeb8d05d4fc3d17bba008be4e9f9e3675d42c9d133c293e823711a7ddeb6e3cefd57ba70daada6d418dc1ea13b895edb5e1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}