{
  "manageEntity": {
    "action": "Save",
    "entityId": "786069308",
    "entityType": "Track",
    "nonce": "0x290b6537923e2b3043bf3818535c2f97e3afa9c11a405b03d781cab0d942131b",
    "signature": "0x9644f9f7c30b7192bfb5774ad194563f6cd62ad4088c51b0065923268fea34eb7bda0fd382258d6b7753e8fbd4921db5d5a5c3ec2772b9dc8fe6cd969d0d16b01c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}