{
  "manageEntity": {
    "action": "Save",
    "entityId": "297491233",
    "entityType": "Track",
    "nonce": "0xef67b4f200a0066d223c8125e63da505c4ed91d5a6b913ee0f5a6d3226b9ae78",
    "signature": "0x6431908724ddb6e804a8e52a1ba64bd7e384ac0f7a2679d3c93b543c6fe7973a42299960603cc6dd3d49cc60163cb8e9e1cac643bb6e0bdb2fa9261dd8bf29c81b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}