{
  "manageEntity": {
    "action": "Save",
    "entityId": "2037432349",
    "entityType": "Track",
    "nonce": "0xee48b9ab7df9c564f4069d43558bf906cedc3698d36dfd302b7cb95bb55ebadd",
    "signature": "0x0213a30c1fe808d354fcaf48f33ea1984c4a2550512774470a8f54ae5fb757fe0a0882d697b49dee0b2b98d481ecc577f3332cbc3d6c5e4d827e64ff855bccaa1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}