{
  "manageEntity": {
    "action": "Save",
    "entityId": "69309",
    "entityType": "Track",
    "nonce": "0xedfef70e12a2cad19e5ed061526a0b2cef43371a03e4aa5d2694608c6e7c9ee4",
    "signature": "0x63c699911deb2d06239ae7a6e292c78981aa503959938af31067902c875624d852884e2db50e217cace95954f27c50e735f6c218eba5f4b083a38d0fec18c98c1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}