{
  "manageEntity": {
    "action": "Save",
    "entityId": "1993786097",
    "entityType": "Track",
    "nonce": "0x1a9f080a6aa8a4efaf94c99da8fc88bda4dadf3f79299aa757522df76c928037",
    "signature": "0xa504ef06c4c22ba8a6e655b0a478f0c744d6ffcec73fb07d486560dafcf858bb7aa77c1a11b65c949ad54fc7e440a4b24ae2e507d9ca4d5749130e5ef862c6041b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}