{
  "manageEntity": {
    "action": "Save",
    "entityId": "729379741",
    "entityType": "Track",
    "nonce": "0x7c9c5e65e9875a288087996f45fdd2ca7cfb0468fa0a6786599c15429442602f",
    "signature": "0x63cf4fabbfe213b19b90a95baca333e0e638fb7ea748684b10bdbd0b428d8cd61ca297ae3ce0e223c5ff2f5ba4f837c38ac70c3874055c99975eddb8657d5fb71b",
    "signer": "0x08182D4D7A59E5052b408dBB15149621Da38b9da",
    "userId": "991159359"
  }
}