{
  "manageEntity": {
    "action": "Save",
    "entityId": "214771",
    "entityType": "Track",
    "nonce": "0xe76722e91ecc627c7a67adc72201717f9cad5830e16dd2c1a6404a34554b5621",
    "signature": "0xf14f905af0e1beabae65afba9dac2d7576670b5d577b0f5fdb3f537390149dfa17e88fc956f28e4970cde571641ea655d13efb56e2515a1f7cb94ce427a600361b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}