{
  "manageEntity": {
    "action": "Save",
    "entityId": "570586168",
    "entityType": "Track",
    "nonce": "0x2ff6e48f7e01a523ba629d9203b8f6f3ccff231ca3232feac98be363c5d09d86",
    "signature": "0xaa26b0e19902b1c1c9222f67d9b4824b0847b89dbf890a4ae209e3b2e48f30063659cbc91f96caa1ce0a6ba9c41e5d7e2e477003f601d16accbec4f5aa4dab981b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}