{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262297710",
    "entityType": "Track",
    "nonce": "0xa88ac7b57b926160f6af4a53842bc700bb0a3dc0e70d1638f0bf4efb7b9a45b5",
    "signature": "0x9b93dad72973b6b184a1e9f6588d87876653c82d92232597e8ec1087547fd54d6c5d45f926331e8f1f566b2004307b94d083650e43672522bee95d4a932a975d1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}